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公开(公告)号：KR1020040057212A
公开(公告)日：2004-07-02
申请号：KR1020020083820
申请日：2002-12-26
Applicant: 재단법인 포항산업과학연구원
IPC: C04B40/02
CPC classification number: C04B40/0236
Abstract: PURPOSE: Provided is a method for neutralizing the surface and the inside of concrete effectively in a short time by curing concrete in the air and then in CO2 atmosphere. The neutralized concrete is used for concrete structures of oceanic habitats. CONSTITUTION: The surface and the inside of concrete are neutralized by curing concrete within 5days and then curing the cured, not completely hardened, concrete in CO2 atmosphere for 6-24hrs, wherein the concentration of CO2 is less than 5%. The resultant concrete is neutralized to the depth of 6mm and the pH of liquid eluted from the surface of concrete is 8.5 or less.
Abstract translation: 目的：通过在空气中固化混凝土，然后在二氧化碳气氛中，在短时间内有效地中和混凝土表面和内部的方法。 中和的混凝土用于海洋栖息地的混凝土结构。 构成：混凝土的表面和内部在五天内通过固化混凝土中和，然后在二氧化碳气氛中固化6-24小时的固化，不完全硬化的混凝土，其中CO2的浓度小于5％。 所得到的混凝土被中和到6mm的深度，从混凝土表面洗出的液体的pH为8.5或更小。
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公开(公告)号：KR1020040026383A
公开(公告)日：2004-03-31
申请号：KR1020020057836
申请日：2002-09-24
Applicant: 재단법인 포항산업과학연구원
IPC: C01F11/18
CPC classification number: C01F11/181 , C01F11/005 , C01P2006/80 , Y02W30/20 , Y02W30/521 , Y02W30/542
Abstract: PURPOSE: Provided is a method for preparing calcium carbonate with a high purity, which is an environmental-friendly method by using waste resources, i.e., a steel making slag and carbon dioxide or CO2-containing exhaust gas. CONSTITUTION: The method comprises the steps of: crushing steel making slag into a size of 45 micrometers or less and introducing water thereto to adjust the pH to 12 or higher, and separating undissolved powder from the eluted solution by filtration to obtain a calcium-eluted solution having a pH of 12 or higher; and reacting the calcium-eluted solution with CO2 or CO2-containing exhaust gas under a pH of 7 or higher. In particular, the steel making slag comprises 20-52 wt% of calcium oxide.
Abstract translation: 目的：提供一种高纯度的碳酸钙的制造方法，其是通过使用废物资源，即炼钢渣和二氧化碳或含CO 2废气的环保方法。 方法：该方法包括以下步骤：将制钢渣粉碎至45微米或更小的尺寸并引入水以将pH调节至12或更高，并通过过滤从洗脱溶液中分离未溶解的粉末，得到钙洗脱 pH为12以上的溶液; 并在pH7或更高的条件下使钙洗脱的溶液与含CO 2或含CO 2的废气反应。 特别地，炼钢渣包含20-52重量％的氧化钙。
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公开(公告)号：KR1020040020495A
公开(公告)日：2004-03-09
申请号：KR1020020052103
申请日：2002-08-30
Applicant: 주식회사 포스코 , 재단법인 포항산업과학연구원
IPC: C02F1/66
Abstract: PURPOSE: Provided is a method for inhibiting strong alkali leachate generation from iron works slag by coating slag with a specified grain size with silica. CONSTITUTION: The method comprises the steps of (a) introducing iron works slag with grain size no greater than 20 mm into water glass containing 4 to 8 wt.% of SiO2, and (b) keeping the slag in the water glass with pH 8 to 10 for at least 30 minutes, thereby coating silica on the surface of the slag.
Abstract translation: 目的：提供一种通过用二氧化硅涂覆规定粒度的炉渣来抑制来自铁厂渣的强碱浸出液的方法。 方法：该方法包括以下步骤：（a）将粒度不大于20毫米的铁工炉渣引入含有4至8重量％SiO2的水玻璃中，（b）将炉渣保持在水玻璃中，pH为8 至10℃至少30分钟，从而在炉渣表面涂上二氧化硅。
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公开(公告)号：KR100411291B1
公开(公告)日：2003-12-18
申请号：KR1019990056387
申请日：1999-12-10
Applicant: 재단법인 포항산업과학연구원
IPC: C02F1/66
Abstract: PURPOSE: A reducing method of sludge discharged from neutralization treatment of phosphoric acid wastewater is provided, which can reutilize the waste from steel work and reduce consumption of hydrated lime and discharge amount of sludge. CONSTITUTION: The method comprises as follows: (i) dip waste containing line and magnesium in water and agitate for at least 5 min.; (ii) extract the supernatant which contains lime and magnesium and the pH of which is more than 10; and (iii) neutralize the SO4-2, F- and PO4-3 containing wastewater that is discharged from phosphoric acid manufacturing plant with the extracted solution to form calcium phosphate, calcium fluoride and calcium sulfate precipitates that are discharged as sludge.
Abstract translation: 目的：提供磷酸废水中和处理排放污泥的还原方法，可以重复利用钢铁工业废物，减少熟石灰消耗量和污泥排放量。 组成：该方法包括如下：（i）将含有线和镁的废物浸入水中并搅拌至少5分钟; （ii）提取含有石灰和镁且pH值大于10的上清液; 和（iii）用萃取液中和含磷酸生产装置排出的含SO4-2，F和PO4-3的废水，形成作为污泥排出的磷酸钙，氟化钙和硫酸钙沉淀。
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公开(公告)号：KR100398413B1
公开(公告)日：2003-12-18
申请号：KR1019980057609
申请日：1998-12-23
Applicant: 재단법인 포항산업과학연구원 , 주식회사 포스코
IPC: C21C5/36
Abstract: PURPOSE: A method for preventing the generation of white muddy water of electric furnace slag is provided to prevent white muddy water from being generated by re-oxidizing the electric furnace slag. CONSTITUTION: In preprocessing electric furnace slag to be used as backfill/reclaim material, the slag is molten again at a temperature over 1350°C. After that, air is sprayed to the molten slag to re-oxidize the slag until the FeO content in the slag is up to 0.5%. Therefore, the electric furnace slag is used as backfill/reclaim material and white muddy water is not generated.
Abstract translation: 目的：提供一种防止电炉炉渣产生白浊水的方法，以防止电炉炉渣再氧化而产生白浊水。 构成：在预处理用作回填/回收材料的电炉炉渣中，炉渣在超过1350℃的温度下再次熔化。 之后，将空气喷射到熔渣中以重新氧化炉渣，直到炉渣中的FeO含量达到0.5％。 因此，电炉炉渣被用作回填/回收材料，并且不会产生白色泥泞的水。
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Patent Agency Ranking
公开(公告)号：KR1020030052340A
公开(公告)日：2003-06-27
申请号：KR1020010082226
申请日：2001-12-21
Applicant: 주식회사 포스코 , 재단법인 포항산업과학연구원
IPC: C04B18/14
CPC classification number: Y02W30/94 , C04B18/141
Abstract: PURPOSE: A method for treating the surface of steel making slag is provided, to promote the elusion of Ca by controlling the moisture in the treatment for enabling the surface to be treated in short time, thereby inhibiting the high pH of the effluent of a steel making slag. CONSTITUTION: The method comprises the step of treating the steel making slag fine powder with a size of 10 mm or less under the condition of a CO2 gas atmosphere and a humidity of 70 % or more for 4 hours, to form a CaCO3 layer on the surface of slag. Preferably the treatment time is 4-36 hours.
Abstract translation: 目的：提供一种处理炼钢渣表面的方法，通过控制处理中的水分来促进Ca的消除，使表面能够在短时间内进行处理，从而抑制钢的流出物的高pH值 造渣。 构成：该方法包括在CO 2气体气氛和70％以上的湿度条件下处理尺寸为10mm以下的炼钢渣细粉4小时的步骤，在其上形成CaCO 3层 炉渣表面。 优选地，治疗时间为4-36小时。
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公开(公告)号：KR1020030018688A
公开(公告)日：2003-03-06
申请号：KR1020010052942
申请日：2001-08-30
Applicant: 주식회사 포스코 , 재단법인 포항산업과학연구원
IPC: B22C3/00
CPC classification number: B22C3/00 , C10M103/02
Abstract: PURPOSE: Provided is a mold release agent for application to casting of molten slag, which has higher pyrolysis temperature when compared to conventional mold release agents. CONSTITUTION: The mold release agent comprises 20 to 85 wt.% of a material having carbon radical and 15 to 80 wt.% of a carbon-based material wherein the material having carbon radical is limestone sludge and the carbon-based material is at least one material selected from coal based material such as coke sludge, paper, rubber, plastic or their sludge.
Abstract translation: 目的：提供一种用于铸造熔渣的脱模剂，与常规脱模剂相比，其具有较高的热解温度。 构成：脱模剂包含20至85重量％的具有碳自由基和15至80重量％碳基材料的材料，其中具有碳自由基的材料是石灰石污泥，并且碳基材料至少是 一种选自煤基材料如焦炭污泥，纸，橡胶，塑料或其污泥的材料。
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公开(公告)号：KR1020030016891A
公开(公告)日：2003-03-03
申请号：KR1020010050692
申请日：2001-08-22
Applicant: 주식회사 포스코 , 재단법인 포항산업과학연구원
IPC: C04B18/14
CPC classification number: C04B18/141 , Y02W30/94
Abstract: PURPOSE: Provided are a granulated slag having unit weight of 1.45-1.70 g/l, which is used as a substitute to sand for concrete, and a concrete composition comprising the granulation slag. CONSTITUTION: The slag, which is used as a substitute to sand for concrete, has unit weight of 1.45-1.70 g/l. The concrete composition excellent in durability, comprises the slag having unit weight of 1.45-1.70 g/l so as to replace 30 wt% or less of the sand with the slag having unit weight of 1.45-1.7 g/l. The concrete composition comprising 50% or less of the slag as sand is effective to produce a concrete construction requiring durability.
Abstract translation: 目的：提供单位重量为1.45-1.70g / l的粒状炉渣，其用作混凝土砂的替代品，以及包含造粒渣的混凝土组合物。 构成：用作混凝土砂的替代渣，单位重量为1.45-1.70g / l。 耐久性优异的混凝土组合物包含单位重量为1.45〜1.70g / l的炉渣，以使单体重量为1.45〜1.7g / l的炉渣代替30重量％以下的砂。 包含50％以下的渣作为砂的混凝土组合物有效地产生需要耐久性的混凝土结构。
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公开(公告)号：KR1020020050429A
公开(公告)日：2002-06-27
申请号：KR1020000079578
申请日：2000-12-21
Applicant: 주식회사 포스코 , 재단법인 포항산업과학연구원
IPC: C21B3/06
CPC classification number: Y02W30/543 , C21B3/06 , Y02W30/90
Abstract: PURPOSE: A pretreatment method of steel slag by using carbon dioxide is provided to inhibit calcium release from steel slag by calcium carbonate deposition on steel slag by using carbon dioxide, thus preventing sudden pH increase of water being contacted with the steel slag. CONSTITUTION: In a pretreatment method of steel slag used as raw materials for artificial fish reef or breakwater block, the present invention is characterized in that steel slag with particle sizes of less than 25mm is kept in an exhaust gas containing carbon dioxide gas 3 to 30 % for at least 2 days.
Abstract translation: 目的：通过使用二氧化碳对钢渣进行预处理，通过使用二氧化碳，通过碳酸钙沉积在钢渣上，防止钢渣从钢渣中释放，防止与钢渣接触的水的突然pH升高。 构成：在用作人造鱼礁或防波堤原料的钢渣的预处理方法中，本发明的特征在于，将粒径小于25mm的钢渣保持在含有二氧化碳气体3〜30的废气中 ％至少2天。
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公开(公告)号：KR1020020049584A
公开(公告)日：2002-06-26
申请号：KR1020000078773
申请日：2000-12-19
Applicant: 주식회사 포스코 , 재단법인 포항산업과학연구원
IPC: C01F11/02
CPC classification number: C01F5/02 , B09B3/0016 , Y02W30/20 , Y02W30/542 , Y02W30/90
Abstract: PURPOSE: Provided is a method for producing a treatment liquid for decarboxylating seawater having extremely low content of silica by using slag which is a byproduct generated in ironworks. CONSTITUTION: The method comprises the steps of decarboxylating seawater and precipitating magnesium hydroxide from the seawater. The decarboxylation step is characterized by using slag eluate produced by crushing slag into particles having size of 45 micrometer or less, injecting water, adjusting pH of the solution to 11.5-11.8, and then filtering the solution. The slag is selected from blast furnace slag, electric furnace oxidizer slag and dephosphorus slag comprising, as main components, CaO, SiO2 and iron oxide and, as an auxiliary component, MgO.
Abstract translation: 目的：提供一种通过使用作为铁制品中产生的副产物的炉渣来生产具有极低含量二氧化硅的海水脱羧处理液的方法。 构成：该方法包括使海水脱水并从海水中沉淀出氢氧化镁的步骤。 脱羧步骤的特征在于使用通过将炉渣粉碎成尺寸为45微米或更小的颗粒产生的渣洗液，注入水，将溶液的pH调节至11.5-11.8，然后过滤溶液。 炉渣选自CaO，SiO 2和氧化铁作为主要组分的高炉矿渣，电炉氧化炉渣和脱磷渣，作为辅助成分的MgO。
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